Honda TRX680FA Service Manual page 291

DRIVETRAIN SYSTEM
3. Vehicle Test-riding
Test-ride the vehicle with the mode select switch
at ESP.
Check for engine braking with the transmission
in the 2nd and 3rd ranges.
Is there engine braking with the transmission in
any range except 1st?
YES - Faulty 1st shift clutch system (page I4-
86)
NO - Hydraulic circuit malfunction is the
likely cause. Check the oil pressure
(page 14-12).
Engine Stalls When Accelerating
1. Vehicle Creep Check
NOTE:
• Perform this test after engine idle speed
inspection (page 6-55).
Start the engine.
Shift the sub-transmission in drive position with
the brake applied.
Wait several seconds. Release the brake and
check the vehicle condition.
Does the vehicle creep?
YES - Perform the inspection "Vehicle creeps
when idling" on while applying the
brake in the same manner as above
(page 14-8).
NO - Hydraulic circuit malfunction is the
likely cause. Check the oil pressure
(page 14-12).
SHIFT CONTROL FAILURE
A/T Does Not Shift
1. Vehicle Test-riding
Test-ride the vehicle with the mode select switch
at ESP. Check that it shifts to each range.
Does the vehicle shift?
YES - • Faulty throttle position sensor sys-
tem. Check the installation condition
(page 6-43).
• Faulty VS sensor system. Check the
installation condition (page 18-30).
NO - GO TO STEP 2.
2. Shift Solenoid Valve Operation Check
Disconnect the shift solenoid valve 2P (Black)
and 2P (Brown) connectors. Connect a 12 V bat-
tery to each solenoid terminals.
It should operate (sounds) when the battery is
connected.
Does the solenoid valves operate?
NO - Faulty shift solenoid valve A and/or B.
YES - Hydraulic circuit malfunction is likely
cause. Check the oil pressure (page 14-
12).
14-9